/******************************************************************************
*
*   Copyright (c) 2019 Intel.
*
*   Licensed under the Apache License, Version 2.0 (the "License");
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the License at
*
*       http://www.apache.org/licenses/LICENSE-2.0
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*   See the License for the specific language governing permissions and
*   limitations under the License.
*
*******************************************************************************/

/**
 * @file
 * This file consist of implementation of FAPI STOP.indication message.
 *
 **/

#include "nr5g_fapi_framework.h"
#include "gnb_l1_l2_api.h"
#include "nr5g_fapi_fapi2mac_api.h"
#include "nr5g_fapi_fapi2phy_api.h"
#include "nr5g_fapi_fapi2mac_p5_proc.h"
#include "nr5g_fapi_fapi2phy_p5_proc.h"
#include "nr5g_fapi_fapi2phy_p5_pvt_proc.h"

/** @ingroup group_source_api_p5_fapi2mac_proc
 *
 *  @param[in]  p_phy_ctx Pointer to PHY context.
 *  @param[in]  p_fapi_resp Pointer to IAPI STOP.indication message structure.
 *  @return     Returns ::SUCCESS and ::FAILURE.
 *
 *  @description
 *  This message allows PHY to indicate that it has successfully stopped
 *  and returned to the CONFIGURED state. 
 *
**/
uint8_t nr5g_fapi_stop_indication(
    p_nr5g_fapi_phy_ctx_t p_phy_ctx,
    PSTOPRESPONSEStruct p_iapi_resp)
{
    uint8_t phy_id;

    fapi_error_ind_t *p_fapi_error_ind;
    p_fapi_api_queue_elem_t p_list_elem;
    p_nr5g_fapi_phy_instance_t p_phy_instance = NULL;
    nr5g_fapi_stats_t *p_stats;

    if (NULL == p_phy_ctx) {
        NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Invalid " "phy context"));
        return FAILURE;
    }

    if (NULL == p_iapi_resp) {
        NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Invalid "
                "stop response message"));
        return FAILURE;
    }

    phy_id = p_iapi_resp->sSFN_Slot.nCarrierIdx;
    p_phy_instance = &p_phy_ctx->phy_instance[phy_id];
    if (p_phy_instance->phy_id != phy_id) {
        NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Invalid " "phy instance"));
        return FAILURE;
    }

    p_stats = &p_phy_instance->stats;
    p_stats->iapi_stats.iapi_stop_ind++;
    if (SUCCESS == p_iapi_resp->nStatus) {
        if (FAPI_STATE_RUNNING == p_phy_instance->state) {
            p_phy_instance->state = FAPI_STATE_CONFIGURED;
        }
#ifdef DEBUG_MODE
        p_list_elem =
            nr5g_fapi_fapi2mac_create_api_list_elem(FAPI_STOP_INDICATION, 1,
            sizeof(fapi_stop_ind_t));
        if (!p_list_elem) {
            NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Unable to create "
                    "list element. Out of memory!!!"));
            return FAILURE;
        }
        fapi_stop_ind_t *p_fapi_resp;
        p_fapi_resp = (fapi_stop_ind_t *) (p_list_elem + 1);
        p_fapi_resp->header.msg_id = FAPI_STOP_INDICATION;
        p_fapi_resp->header.length = (uint16_t) sizeof(fapi_stop_ind_t);
        /* Add element to send list */
        nr5g_fapi_fapi2mac_add_api_to_list(phy_id, p_list_elem);
        p_stats->fapi_stats.fapi_stop_ind++;
        NR5G_FAPI_LOG(INFO_LOG, ("[STOP.indication][%d]", phy_id));
#else
        fapi_vendor_ext_shutdown_req_t fapi_req;
        fapi_req.header.msg_id = FAPI_VENDOR_EXT_SHUTDOWN_REQUEST;
        fapi_req.header.length = sizeof(fapi_vendor_ext_shutdown_req_t);
        fapi_req.sfn = 0;
        fapi_req.slot = 0;
        fapi_req.test_type = 0;
        nr5g_fapi_shutdown_request(p_phy_instance, &fapi_req);
        nr5g_fapi_fapi2phy_send_api_list();
#endif
    } else if (FAILURE == p_iapi_resp->nStatus) {
        p_list_elem =
            nr5g_fapi_fapi2mac_create_api_list_elem(FAPI_ERROR_INDICATION, 1,
            sizeof(fapi_error_ind_t));
        if (!p_list_elem) {
            NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Unable to create "
                    "list element. Out of memory!!!"));
            return FAILURE;
        }

        /* PHY STOP Failed. Sending Error Indication to MAC */
        p_fapi_error_ind = (fapi_error_ind_t *) (p_list_elem + 1);
        p_fapi_error_ind->header.msg_id = FAPI_ERROR_INDICATION;
        p_fapi_error_ind->header.length = (uint16_t) sizeof(fapi_error_ind_t);
        p_fapi_error_ind->sfn = p_iapi_resp->sSFN_Slot.nSFN;
        p_fapi_error_ind->slot = p_iapi_resp->sSFN_Slot.nSlot;
        p_fapi_error_ind->message_id = FAPI_STOP_REQUEST;
        p_fapi_error_ind->error_code = p_iapi_resp->nStatus;
        /* Add element to send list */
        nr5g_fapi_fapi2mac_add_api_to_list(phy_id, p_list_elem);
        p_stats->fapi_stats.fapi_error_ind++;
        NR5G_FAPI_LOG(INFO_LOG, ("[STOP.indication][ERROR.indication][%d]",
                phy_id));
    } else {
        NR5G_FAPI_LOG(ERROR_LOG, ("[STOP.indication] Invalid status "
                "from PHY"));
        return FAILURE;
    }
    return SUCCESS;
}
